Solutions by everydaycalculation.com
642 - 2042 is -13.
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/42-20/42 6/42-40/42 6/84-20/42 6/42-20/84 18/42-20/42 6/42-60/42 30/42-20/42
© everydaycalculation.com